Bip39 Ian Coleman. Is passphrase similar to PIN? No, a passphrase will not be the same as a PIN. A passphrase, in the context of Bitcoin wallets, is an additional layer of safety to your wallet that actually works along with your seed phrase to encrypt and safeguard your wallet. https://throbsocial.com/story20628306/bip39-wallet-https-linktr-ee-bip39-a-review-of-bip39-generator